1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8727f1fd6609de0dbf547f33504035596071881be396fc02dd7f3d7cbb108e9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d7fa5b6-e3b5-4002-8280-2095c2f3786f.json and https://artists.proofprofile.net/proofs/artist/7d7fa5b6-e3b5-4002-8280-2095c2f3786f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0734e3b08e45bd4c7198a734dc2052a4f03b1cbfc75aafe8071e51fa4abf86. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2122745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d4d1e3c48ff52a0baa7c1a6a99c8278e25fac33cd2a67b39108cadc3d4f9c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2122746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79b889287feeffd3e758d1ce16a9cc37ba24ebfba179c0a7338746ced363e46. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2122752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0890953181945a7c0d5275538ae02ed2f9021bec02e5d5d6b20b0e6a587cea2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2122753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14c06b7c427221355777dfba4661edd4bc69c2498f20890dd85d779054f91d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE25W2401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abb6cc2dd3928ab8d089204eee596d5230158498d094469206dc6ca766c67f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE25W2400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa906cf19d5e52497cf8bcbce40bf642cbfa1381633ef5d03d9156fa0ec3de3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE25W2401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587311e20da01c5264132c0a0aa1a62be1b984012995eb5d44c4c4edd52d4746. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE25W2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70701964b124177f5ddab3ed441b9bcc5631485b275a62575083cf9ed4faf387. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE25W2501101.